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夏季高温对蔬菜生长发育带来诸多不利影响,是造成蔬菜秋淡的基本原因。因此,在蔬菜生产上搞好高温防御工作,对夏季蔬菜栽培显得特别重要。1.高温对蔬菜的主要危害植株失水。气温在30℃以上,若遇无雨或少雨,就会造成土壤干旱和空气干燥,当蔬菜根系从土壤中吸收的水分不能满足植株蒸发的需求,就会造成蔬菜植株叶片卷曲、脱落,品质变劣、产量下降,甚至枯萎、干死。
Summer high temperature on vegetable growth and development have brought many adverse effects, is the basic reason for the fall vegetables. Therefore, doing a good job in high-temperature defensive work on vegetable production is particularly important for summer vegetable cultivation. 1. The main heat of vegetables on the plant water loss. Temperature above 30 ℃, in case of rain or less rain, it will cause soil drought and air drying, when the vegetable roots absorb moisture from the soil can not meet the needs of plant evaporation, it will cause the leaves of vegetable plants curled, fall off, the quality of change Bad, the output drops, even wither and die.